PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/19-16:43:20
G02     205.5          38.8               10.1 +/-    1.59      15.0 +/-    1.59  0.090 / 0.120
G12     309.5          18.3                8.2 +/-    1.44      18.8 +/-    1.44  0.070 / 0.110
G17     38.1           47.6                7.4 +/-    1.23       9.7 +/-    1.23  0.040 / 0.060
G19     14.4           61.1                8.0 +/-    0.82       9.0 +/-    0.82  0.050 / 0.070
G24     291.7          39.9               11.7 +/-    4.03      17.1 +/-    4.03  0.050 / 0.120
G28     104.7          32.8                9.0 +/-    0.61      14.9 +/-    0.61  0.060 / 0.140